Review on 🔵 CMS50D-BT Upgraded Version with 24-Hour Memory & USB Connectivity for Home & Sports Use - Blue by Sam Anez

I recently had a heart attack and bought this device to monitor SpO2 levels and heart rate while walking. The device arrived on time and without damage. All functions work as advertised. The recording function works, although I haven't tested it for a long time. The downloaded software does not come with clear instructions. I have found that there are 3 programs and the most important is the SpO2 helper. You have used this program to access real-time data and recorded data, which can be viewed or saved to a file. The downgrading to 4 stars is due to the software and the instructions it contains. I would highly recommend it to others. The device is used during my walking exercises, I wear it for up to 45 minutes and it works well.